12220402221 has 12 divisors (see below), whose sum is σ = 17915151072. Its totient is φ = 8025338376.

The previous prime is 12220402193. The next prime is 12220402241.

12220402221 is a `hidden beast` number, since 1 + 22 + 20 + 402 + 221 = 666.

12220402221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12220402221 - 2¹⁰ = 12220401197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12220402194 and 12220402203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220402241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10132401 + ... + 10133606.

It is an arithmetic number, because the mean of its divisors is an integer number (1492929256).

Almost surely, 2^12220402221 is an apocalyptic number.

It is an amenable number.

12220402221 is a deficient number, since it is larger than the sum of its proper divisors (5694748851).

12220402221 is a wasteful number, since it uses less digits than its factorization.

12220402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20266080 (or 20266077 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The spelling of 12220402221 in words is "twelve billion, two hundred twenty million, four hundred two thousand, two hundred twenty-one".